update user guide for replacing 'br/' with 'br /'
diff --git a/user_guide/helpers/string_helper.html b/user_guide/helpers/string_helper.html
index 3141240..ebdbd3a 100644
--- a/user_guide/helpers/string_helper.html
+++ b/user_guide/helpers/string_helper.html
@@ -96,9 +96,9 @@
<p>Usage example:</p>
-<code>echo increment_string('file', '_'); // "file_1"<br/>
-echo increment_string('file', '-', 2); // "file-2"<br/>
-echo increment_string('file-4'); // "file-5"<br/></code>
+<code>echo increment_string('file', '_'); // "file_1"<br />
+echo increment_string('file', '-', 2); // "file-2"<br />
+echo increment_string('file-4'); // "file-5"<br /></code>
<h2>alternator()</h2>
@@ -186,4 +186,4 @@
</div>
</body>
-</html>
\ No newline at end of file
+</html>